| 摘要 |
<p>The valley fastening for the mechanical fastening of insulating materials and sealing sheets on flat roofs has a load distributor with an opening in the base through which fits a screw (1) with its head (3) supported on the load distributor and with its point (4) cutting into the roof sub-structure or protruding into a dowel anchoring in the sub-structure. Oppositely disposed, raised, narrow support ribs are provided on both sides of the opening in the load distributor and upon them bears the underside of the screw head.</p> |
